All local centers of mass vacuum free fall along identical
(parallel displaced) minimum action trajectories; then

Inertial and gravitational mass are indistinguishable;

The effects of a massive body and an accelerating geometry
are indistinguishable.

EITHER...

The EP is true, gravitation is parity-even gerade,
inertial and gravitational masses are inseparably coupled,
the vacuum is achiral. Parity violations (e.g., the Weak Interaction)
are extrinsic symmetry breakings.

OR

The EP is not true, gravitation is parity-odd ungerade,
inertial and gravitational masses can be decoupled, the vacuum
is chiral (e.g., possessing a background pseudoscalar field in
the massed sector that differentially interacts with opposite
parity atomic mass configurations). Parity violations are
intrinsic (space is a left foot) and can be demonstrated with
chemically and macroscopically identical, opposite parity mass
distributions (left and right shoes).

Conservation of angular momentum enforced by isotropic vacuum and
Noethers' theorem would not obtain for opposite parity test masses.
(Parity is not a Noetherian symmetry for being discontinuous and not
approximated by a Taylor series.)

A left foot can only be detected by a right shoe; socks and left
shoes will fit almost identically. Do (metaphoric) left and right
shoes fall identically? Somebody should look. A parity calorimetry
test offers a 33,000-fold improvement in EP anomaly sensitivity
in only two days of measurements.

Chemically identical, opposite parity mass distributions have
opposite chirality in all directions (all atom coordinates are
sign-reversed). They have unequal insertion energies into a chiral
vacuum background - a left foot fitted with left and right shoes.
That divergence ends when atom positions are randomized: melt,
vaporize, dissolve, or burn. Energies of transition must be
different for opposite parity insertions becoming identical
achiral states. A pair of calorimeters can falsify GR and
string theory.

The Earth inertially accelerates about its spin axis as it
gravitationally accelerates in its solar orbit. Chiral vacuum
interaction, (massinertial - massgravitational)
divergence, will be modulated by shifting phase angles of inertial
and gravitational acceleration with local time of day compared
with opposite parity test masses' geographic orientation.

Two local differential scanning calorimeters located between
40°-50° latitude (optimal 44.95° latitude; WGS 84)
preferably between 06 October and 01 April (optimal 03 January)
are abutted and positioned so that their sample pans are located
along a north-south line. Each holds a ~3 mm diameter ~17 mg solid
single crystal sphere of benzil, one in space group P3121
(right-handed) and one in P3221 (left-handed).
H(fusion)
for both are simultaneously run. The procedure is run with new
crystals at 0600 hrs, noon, 1800 hrs, and midnight local time.
Half-hour intervals would fill in the curve. If all
Hfusion
at all times are not equal within experimental error (differential
output would be maximum signal, null, maximum, null), the experiment
is repeated the next day with the calorimeters aligned east-west to
confirm. The
Hfusion
will have a six hour phase shift on the second day if the signal is real.

Benzil is an achiral molecule in solution, molten, or gas phase.
Crystal lattice forces rotationally distort the molecule and
stack it into homochiral helices giving either space group
P3121 or space group P3221 for the solid,

Mass distribution parity divergence of atomic nuclei for benzil
is 0.999713 of total mass. That is a factor of 417 better than
Adelberger and 520 better than Newman. A
10-13 sensitivity composition Eötvös experiment is a
2-3·10-18 sensitivity calorimetry parity experiment
for improved signal amplitude and active mass. A factor of 33,000 or
41,000 improvement is significant.

We are informed that Adelberger's Be/Ti comparison also tests
baryon number (neutrons versus protons). Baryon number through
Noether's theorem couples to an internal symmetry, SU(3) "winding
number." Conserved quantities arising from internal symmetries
cannot first-order source an observable. Given the scholarly
publication we run its numbers and contrast net active mass with
a parity Eötvös experiment in quartz,